#include <stdio.h>

int main() {
	
	const int r0 = 123;
	const int &r1 = 123;
	const int &r2 = 123;
	const int &r3 = r2;
	
	printf("%p\n", (void *)&r0);
	printf("%p\n", (void *)&r1);
	printf("%p\n", (void *)&r2);
	printf("%p\n", (void *)&r3);
	
	return 0;
}